Milan, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.7 °F (low) to 59.7 °F (high). Annual precipitation averages 39.8 Inches. Milan is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 19.1 °F | 33.6 °F | 2.69 in. |
| February | 20.6 °F | 36.3 °F | 2.29 in. |
| March | 28.2 °F | 45.5 °F | 2.88 in. |
| April | 38.6 °F | 58.9 °F | 3.95 in. |
| May | 50.2 °F | 70.3 °F | 3.87 in. |
| June | 60.1 °F | 79.2 °F | 4.18 in. |
| July | 63.8 °F | 83.2 °F | 3.99 in. |
| August | 61.8 °F | 81.4 °F | 3.57 in. |
| September | 54.6 °F | 75.4 °F | 3.55 in. |
| October | 43.6 °F | 63.4 °F | 3.3 in. |
| November | 34.1 °F | 50.0 °F | 2.86 in. |
| December | 25.4 °F | 38.7 °F | 2.66 in. |
| Annual | 41.7 °F | 59.7 °F | 39.79 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |